When you bake cakes for a living, it has to be nearly impossible to watch what you eat. But Ace of Cakes star Duff Goldman is doing just that—and his weight loss so far makes him look nearly unrecognizable.

On Tuesday, Goldman posted a side-by-side comparison on Instagram, and the weight loss is striking. "Wow. It's been three months and I feel like these are photos of two different people," he wrote.

Goldman has been frequently giving fans updates on his fitness program, even lifting weights while on vacation in Israel. According to E! News, he told fans that he's losing weight "the old school way," focusing on "eating clean, riding my bike, and lifting weights."